package com.easy.test.util;

import java.security.MessageDigest;

public class MD5 {
  public final static String encode(String s){
	  char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
              'a', 'b', 'c', 'd', 'e', 'f' };
      try {
          byte[] strTemp = s.getBytes();
          MessageDigest mdTemp = MessageDigest.getInstance("MD5");
          mdTemp.update(strTemp);
          byte[] md = mdTemp.digest();
          int j = md.length;
          char str[] = new char[j * 2];
          int k = 0;
          for (int i = 0; i < j; i++) {
              byte byte0 = md[i];
              str[k++] = hexDigits[byte0 >>> 4 & 0xf];
              str[k++] = hexDigits[byte0 & 0xf];
          }
          return new String(str);
      } catch (Exception e) {
          return null;
      }
  }
}
